[esa-t474] beam DQ

[Woods, Michael B.]

 Hi Bino,
- the Linac phases affect the longitudinal phase space, particularly the energy spread and the bunch length.  The relevant phase is PHAS DR12 63 VACT
- for S29 feedback, yes units are um and urad
- fb31 EGAIN1E- is an actuator variable that talks to the S27 and S28 sub-booster phases to set the beam energy.  Not sure of units.  For monitoring of beam energy I think you want to look at fb31 engye-.
mike

-----Original Message-----
From: Bino Maiheu [mailto:bino at hep.ucl.ac.uk] 
Sent: Wednesday, August 29, 2007 11:12 AM
To: ESA T474 Mailing list
Subject: [esa-t474] beam DQ

hi all. I'm adding a repository with beam DQ plots ( fb setpoints, corrector settings, toroid readings, linac phases etc... ) it's going in the usual place http://www.hep.ucl.ac.uk/lc/T474/EsaData/daql/
under beam. I'll have to rerun the plots once i have had a closer look to the calibrated 3I2/3I2 toroid readings. once that's done, i'll link everyting off the runinfo database and put some additional info in it, like e.g. average feedback setpoint positions.

there are a number of things however i would like to understand better, so if anyone has an idea of the following, you're welcome, i'll add it to the database

- would be nice to have some docu on what the LINAC phases influence
  down in the end station

- the sector 29 feedback, i assume the units there are um and urad ?

- the fb31 EGAIN1E-  (FB31_FB31ESA_EGAIN1E-), what would be exactly in
  there ? ( units ? )


thanks.
bino


-- 
                                                  !!!!!
                                                 ( o o )
          @ -- Bino Maiheu, Dr. ;) ---------oOO----(_)----OOo------- @
         /  :: WORK                .::  /  :: HOME             .::  /
        /  University College London   /                           /
       /  Physics and Astronomy       /  31 Kilgour Road          /
      /  Gower Street                /  Forest Hill              /
     /  London WC1E 6BT             /  London SE23 1PG          /
    /  [tel] +44 20 7679 3454      /  United Kingdom           /
   /  [fax] +44 20 7679 7145      /  [mob] +44 7747 75 58 78  /
  @ -------------------------------------------------------- @


_______________________________________________
esa-t474 mailing list
esa-t474 at hep.ucl.ac.uk
https://mail.hep.ucl.ac.uk/mailman/listinfo/esa-t474